Computers

Computers

1. fetch

   • decode
     • execute
       • The instruction is carried out upon the data (executed).
     • CPU makes sense of the instruction it has just fetched.
   • CPU fetches some data and instructions from main memory then store them

2. central process unit

3. computer components

   • fan - helps cool the components that are hot
   • motherboard - connects all components
   • cpu - processes information
   • power supply - supplies power to components
   • RAM - stores data while powered
   • hard drive - reads and writes data onto metal platters
   • floppy drive - reads and writes information from floppy disks
   • optical drive - reads and writes data stored on compact discs

4. RAM and ROM

   • ROM is permenant data. It stores data that helps it to function
     • Read Only Memory
   • RAM is temporary data. It stores processed data while powered
     • Random Access Memory

5. 1 hertz

   • 1 cycle per second
     • 1 instruction carried out per second

6. 1 kilohertz

7. 1 megahertz

8. 1 gighertz